![How can airport security scanners detect certain things, rather than just metal? How can it determine the difference between a gun and a watch if they're both made of metal? - Quora How can airport security scanners detect certain things, rather than just metal? How can it determine the difference between a gun and a watch if they're both made of metal? - Quora](https://qph.cf2.quoracdn.net/main-qimg-03512c47f24f568b17da135e9e758c66.webp)
How can airport security scanners detect certain things, rather than just metal? How can it determine the difference between a gun and a watch if they're both made of metal? - Quora
Can a metal detector/x-ray scanner in the airport security detect liquid gold mixed in organic things like soap, lotion, or shampoo? - Quora
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